2012 Silver Ice Volt w/ leather and polished aluminum wheels
Besides battery current +/- were you not interested in SOC, voltage, cell temperature and TMS data as well? (in order to determine TMS efficiency which I thought this thread was focused.
Most of this type of data will either be held withing the Battery Energy Control Module (BECM) or perhaps one of the TWO Hybrid Powertrain Control Modues (HPCM1 and HPCM2) but I will have to check on that to be certain where this data resides.
GM Director of Global Battery Systems Engineering Bill Wallace revealed within the last couple days that the Volt’s usable battery capacity is now 10.4 kWh, 65% of the 16 kWh total capacity, having been increased from the original 8 kWh usable capacity.